EP 0777366 A3 19991229 - Apparatus for detecting a presence of a predetermined baud rate
Title (en)
Apparatus for detecting a presence of a predetermined baud rate
Title (de)
Einrichtung zur Erkennung der Anwesenheit einer bestimmten Baudrate
Title (fr)
Dispositif de la détection de la présence d'une vitesse prédéterminée
Publication
Application
Priority
US 56989395 A 19951208
Abstract (en)
[origin: EP0777366A2] An apparatus detects (516) a baud rate in a digital signal (442). An N-state counter (404) counts at a rate N times the baud rate and the digital signal is sampled (504) to detect transitions of the digital signal. N tallies (202) record how many transitions occur coincident with each of the states of the counter, and a total number of transitions detected is computed (508). M groups (204-210) of the tallies are formed (510) corresponding to contiguous sequential states of the counter, and for each group a group number is calculated (512) indicating how many transitions are recorded in the tallies of the group. Each group is defined (514) transitional if the group number exceeds a percentage (413) of the total number of transitions, and the baud rate is determined present or absent based upon the groups that are defined as transitional. <IMAGE>
IPC 1-7
IPC 8 full level
H04L 25/02 (2006.01)
CPC (source: EP US)
H04L 25/0262 (2013.01 - EP US)
Citation (search report)
- [A] US 5095498 A 19920310 - DELUCA MICHAEL J [US], et al
- [A] US 5077758 A 19911231 - DELUCA MICHAEL J [US], et al
- [A] US 5181227 A 19930119 - DELUCA MICHAEL J [US], et al
- [E] EP 0782354 A2 19970702 - MOTOROLA INC [US]
Designated contracting state (EPC)
DE FR GB IT NL SE
DOCDB simple family (publication)
EP 0777366 A2 19970604; EP 0777366 A3 19991229; US 5724389 A 19980303
DOCDB simple family (application)
EP 96119529 A 19961205; US 56989395 A 19951208